Respostas

2013-07-04T21:36:26-03:00
A) a = (12 - 3)/(5 - 1) = 9/4

(y - 12) = 9/4 *(x - 5)

4y - 48 = 9x - 45
4y = 9x + 3

y = (9x + 3)/4